C O M M A N D R E F E R E N C E
Command Reference
94
LDC-3700C Series
C H A P T E R
4
The LASer:LIMit:MDP command sets the laser monitor photodiode power limit value.
Parameters
An <nrf value> which represents the laser monitor photodiode power limit, in mW.
Notes
When constant MDP mode is used, the output is limited only by the LIM I value.
The LIM MDP condition may be used to shut the LASER output off, but this requires the
use of the LASer:ENABle:OUTOFF command to set bit 3 of the LASER OUTOFF
ENABLE register.
Examples
"LAS:LIM:MDP 10" -action: sets the laser output power limit to a value which
corresponds to producing 10.00 mW of PD feedback (optical) power.
"Las:Limit:MDp 5" -action: sets the laser output power limit to a value which corresponds
to producing 5.00 mW of PD feedback (optical) power.
The LASer:LIMit:MDP? query returns the value of the laser monitor PD power limit.
Notes
The (LASER) MDP limit is in effect for both laser output current ranges.
Examples
"LAS:LIM:MDP?" -response: 3.0, means the monitor PD power limit is set to 3.0 mW.
":LAS:Limit:MDP?" -response: 10.0, means the monitor PD power limit is set to 10.0
mW.
The LASer:LIMit:V command sets the LASER compliance voltage limit value.
Parameters
An <nrf value> which represents the LASER limit voltage, in volts.
Notes
The voltage limit setting is useful for laser protection. When the maximum operating
voltage of a laser is known, the user may set the voltage limit to a value slightly higher
than the maximum operating voltage. Then, if the laser is accidentally disconnected, the
current source will quickly sense the over-voltage and shut off.
In local operation, the voltage limit is entered by selecting the LIM I parameter, pressing
and holding in the (PARAMETER) SET switch, and then pressing the (LAS DISPLAY) V
switch. Turn the ADJUST knob until the desired value is displayed, and then release the
SET switch.
Examples
"LAS:LIM:V 5.0" -action: the LASER compliance voltage limit is set to 5.0 volts.
":Laser:Limit:V 4.60" -action: the LASER compliance voltage limit is set to 4.6 volts.
LASer:LIMit:MDP
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
LASer:LIMit:MDP?
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
LASer:LIMit:V
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
Summary of Contents for LDC-3700C Series
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Page 10: ...L I S T O F TA B L E S viii LDC 3700C Series...
Page 78: ...RE M O T E O PE R A T I ON Command Syntax 62 LDC 3700C Series C H A P T E R 3...
Page 150: ...C O M M A N D RE F E R E N C E Command Reference 134 LDC 3700C Series C H A P T E R 4...